1: 1,5-anhydro-2-deoxy-4,6-O-[(S)-phenylmethylene]-3-O-(tert-butyldimethylsilyl)-1-[(S(s))-phenylsulfinyl]-D-lyxo-hex-1-enitol; phenyllithium in tetrahydrofuran; anhydrous butyl ether T=-78°C; 0.0833333 h; Inert atmosphere; 2: tributyltin chloride in tetrahydrofuran; anhydrous butyl ether T=-78°C; 2 h; Inert atmosphere;